/Engine/Source/Runtime/Experimental/GeometryCollectionEngine/Public/GeometryCollection/DerivedDataGeometryCollectionCooker.h
Indicates that this plugin is threadsafe. Note, the system itself will not call it concurrently if this false, however, then you are responsible for not calling the system itself concurrently.
true if this plugin is threadsafe
virtual bool IsBuildThreadsafe() const